FAILURE MAP
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FA-78106 / Subtitle cue timing / Open access

Adjacent duplicate cue merging: stored text form · case 01

Output cues keep irregular whitespace and later duplicates fail to merge with them.

Verified by executionVariant 1 · 9 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Unnormalized text is stored, so subsequent comparisons use raw text on one side.

THE FAILURE

Unnormalized text is stored, so subsequent comparisons use raw text on one side.

Unsuccessful approach: Storing trimmed text still keeps doubled inner spaces and newline differences.

Case contract

Walk cues [start,end,text] in order. Text is normalized by collapsing whitespace runs to single spaces and trimming. A cue whose normalized text is nonempty and equal to the previous output cue text, starting at most max_gap after that cue ends (overlaps included), is merged: the output end becomes the later of the two ends. Output cues carry normalized text.

Why this case matters

Subtitle timing defects shift, hide or overlap captions that viewers depend on for comprehension and accessibility.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(cues, max_gap):
    out=[]
    for s,e,t in cues:
        norm=' '.join(t.split())
        if out and norm and out[-1][2]==norm and s-out[-1][1]<=max_gap:
            out[-1][1]=max(out[-1][1],e)
            continue
        out.append([s,e,t])
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: stored text form', [[[0, 100, ' '], [100, 200, ' ']], 0], [[0, 100, ''], [100, 200, '']]), ('regression variant: stored text form', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair probe: stored text form', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('partial repair variant: stored text form', [[[500, 1500, ' Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes '], [2501, 3001, 'Go\nnow']], 100], [[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[500, 1000, ''], [1000, 1100, 'Go now']], 100], [[500, 1000, ''], [1000, 1100, 'Go now']]), ('normal control', [[[500, 1500, ''], [1200, 1300, 'Yes']], 0], [[500, 1500, ''], [1200, 1300, 'Yes']])], [('regression: stored text form', [[[0, 100, 'Go\nnow'], [100, 1100, 'Yes'], [1200, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go\nnow']], 100], [[0, 100, 'Go now'], [100, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go now']]), ('regression variant: stored text form', [[[0, 500, '  '], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']], 0], [[0, 500, ''], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']]), ('partial repair probe: stored text form', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair variant: stored text form', [[[0, 100, 'Go\nnow'], [-200, 800, '  '], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes ']], 0], [[0, 100, 'Go now'], [-200, 800, ''], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']], 40], [[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']]), ('normal control', [[[0, 100, 'Yes sir']], 40], [[0, 100, 'Yes sir']]), ('normal control', [[[500, 1500, 'No']], 40], [[500, 1500, 'No']])], [('regression: stored text form', [[[500, 1000, 'No'], [1101, 1601, 'Yes  sir']], 100], [[500, 1000, 'No'], [1101, 1601, 'Yes sir']]), ('regression variant: stored text form', [[[500, 600, 'Yes  sir'], [699, 1199, 'Go\nnow'], [1299, 2299, 'Yes '], [1999, 2999, 'Yes  sir']], 100], [[500, 600, 'Yes sir'], [699, 1199, 'Go now'], [1299, 2299, 'Yes'], [1999, 2999, 'Yes sir']]), ('partial repair probe: stored text form', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: stored text form', [[[0, 500, 'Go\nnow'], [200, 700, 'Yes sir'], [801, 1801, 'Go\nnow'], [1901, 2401, 'Yes  sir'], [1701, 1801, 'Yes ']], 100], [[0, 500, 'Go now'], [200, 700, 'Yes sir'], [801, 1801, 'Go now'], [1901, 2401, 'Yes sir'], [1701, 1801, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('normal control', [[[500, 1500, '']], 0], [[500, 1500, '']]), ('normal control', [[[500, 1500, ''], [1539, 1639, 'No']], 40], [[500, 1500, ''], [1539, 1639, 'No']]), ('normal control', [[[0, 1000, ''], [700, 1200, 'No']], 40], [[0, 1000, ''], [700, 1200, 'No']])], [('regression: stored text form', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('regression variant: stored text form', [[[500, 1000, '  '], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes '], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']], 0], [[500, 1000, ''], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes'], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']]), ('partial repair probe: stored text form', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: stored text form', [[[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes  sir'], [2082, 3082, 'Yes']], 40], [[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes sir'], [2082, 3082, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, ''], [-200, 800, ''], [799, 1299, 'No'], [599, 1599, 'No'], [1600, 1700, '']], 0], [[0, 100, ''], [-200, 800, ''], [799, 1599, 'No'], [1600, 1700, '']]), ('normal control', [[[0, 100, 'No'], [199, 299, 'No']], 100], [[0, 299, 'No']]), ('normal control', [[[0, 100, 'Yes sir']], 100], [[0, 100, 'Yes sir']])], [('regression: stored text form', [[[500, 1000, ' Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']], 0], [[500, 1000, 'Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']]), ('regression variant: stored text form', [[[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, '  '], [1899, 1999, '']], 100], [[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, ''], [1899, 1999, '']]), ('partial repair probe: stored text form', [[[0, 500, 'Yes  sir'], [-200, -100, '  '], [1, 101, 'Go\nnow'], [501, 601, 'Yes'], [700, 1700, 'Go now']], 100], [[0, 500, 'Yes sir'], [-200, -100, ''], [1, 101, 'Go now'], [501, 601, 'Yes'], [700, 1700, 'Go now']]), ('partial repair variant: stored text form', [[[500, 1500, 'Go now'], [1900, 2400, 'Yes '], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes  sir'], [5501, 5601, ' Yes']], 0], [[500, 1500, 'Go now'], [1900, 2400, 'Yes'], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes sir'], [5501, 5601, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[0, 500, 'No']], 40], [[0, 500, 'No']]), ('normal control', [[[500, 600, 'Go now']], 0], [[500, 600, 'Go now']]), ('normal control', [[[0, 100, ''], [199, 299, 'Yes']], 100], [[0, 100, ''], [199, 299, 'Yes']])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression: stored text form[[0, 100, ' '], [100, 200, ' ']][[0, 100, ''], [100, 200, '']]Failed
regression variant: stored text form[[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']][[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]Failed
partial repair probe: stored text form[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes sir']][[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]Failed
partial repair variant: stored text form[[500, 1500, ' Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes '], [2501, 3001, 'Go\nnow']][[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]Failed
boundary control[[0, 900, 'Yes']][[0, 900, 'Yes']]Passed
boundary control[[0, 500, 'Yes']][[0, 500, 'Yes']]Passed
normal control[[0, 100, 'A'], [150, 200, 'A']][[0, 100, 'A'], [150, 200, 'A']]Passed
normal control[[500, 1000, ''], [1000, 1100, 'Go now']][[500, 1000, ''], [1000, 1100, 'Go now']]Passed
normal control[[500, 1500, ''], [1200, 1300, 'Yes']][[500, 1500, ''], [1200, 1300, 'Yes']]Passed

SHA-256 / db75c8f63f629cee85a4dd2ba0e51db957fb3367c603d0809c91e679bb6d7a87

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(cues, max_gap):
    out=[]
    for s,e,t in cues:
        norm=' '.join(t.split())
        if out and norm and out[-1][2]==norm and s-out[-1][1]<=max_gap:
            out[-1][1]=max(out[-1][1],e)
            continue
        out.append([s,e,t.strip()])
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: stored text form', [[[0, 100, ' '], [100, 200, ' ']], 0], [[0, 100, ''], [100, 200, '']]), ('regression variant: stored text form', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair probe: stored text form', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('partial repair variant: stored text form', [[[500, 1500, ' Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes '], [2501, 3001, 'Go\nnow']], 100], [[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[500, 1000, ''], [1000, 1100, 'Go now']], 100], [[500, 1000, ''], [1000, 1100, 'Go now']]), ('normal control', [[[500, 1500, ''], [1200, 1300, 'Yes']], 0], [[500, 1500, ''], [1200, 1300, 'Yes']])], [('regression: stored text form', [[[0, 100, 'Go\nnow'], [100, 1100, 'Yes'], [1200, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go\nnow']], 100], [[0, 100, 'Go now'], [100, 1700, 'Yes'], [1799, 1899, 'No'], [1599, 2099, 'Go now']]), ('regression variant: stored text form', [[[0, 500, '  '], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']], 0], [[0, 500, ''], [499, 1499, ''], [1500, 1600, 'Yes'], [1599, 2599, 'Yes sir'], [1899, 2399, 'No']]), ('partial repair probe: stored text form', [[[0, 1000, 'Yes  sir'], [1000, 1100, ''], [800, 900, 'Yes sir']], 100], [[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]), ('partial repair variant: stored text form', [[[0, 100, 'Go\nnow'], [-200, 800, '  '], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes ']], 0], [[0, 100, 'Go now'], [-200, 800, ''], [800, 1300, 'Yes sir'], [1301, 1401, ''], [1801, 1901, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']], 40], [[0, 1000, 'Yes'], [1041, 2041, ''], [2041, 2541, 'No']]), ('normal control', [[[0, 100, 'Yes sir']], 40], [[0, 100, 'Yes sir']]), ('normal control', [[[500, 1500, 'No']], 40], [[500, 1500, 'No']])], [('regression: stored text form', [[[500, 1000, 'No'], [1101, 1601, 'Yes  sir']], 100], [[500, 1000, 'No'], [1101, 1601, 'Yes sir']]), ('regression variant: stored text form', [[[500, 600, 'Yes  sir'], [699, 1199, 'Go\nnow'], [1299, 2299, 'Yes '], [1999, 2999, 'Yes  sir']], 100], [[500, 600, 'Yes sir'], [699, 1199, 'Go now'], [1299, 2299, 'Yes'], [1999, 2999, 'Yes sir']]), ('partial repair probe: stored text form', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: stored text form', [[[0, 500, 'Go\nnow'], [200, 700, 'Yes sir'], [801, 1801, 'Go\nnow'], [1901, 2401, 'Yes  sir'], [1701, 1801, 'Yes ']], 100], [[0, 500, 'Go now'], [200, 700, 'Yes sir'], [801, 1801, 'Go now'], [1901, 2401, 'Yes sir'], [1701, 1801, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('normal control', [[[500, 1500, '']], 0], [[500, 1500, '']]), ('normal control', [[[500, 1500, ''], [1539, 1639, 'No']], 40], [[500, 1500, ''], [1539, 1639, 'No']]), ('normal control', [[[0, 1000, ''], [700, 1200, 'No']], 40], [[0, 1000, ''], [700, 1200, 'No']])], [('regression: stored text form', [[[0, 500, 'Yes '], [600, 1600, ' Yes'], [1300, 1800, 'Yes '], [1900, 2400, 'Yes '], [2100, 2200, 'Yes  sir']], 100], [[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]), ('regression variant: stored text form', [[[500, 1000, '  '], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes '], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']], 0], [[500, 1000, ''], [1400, 2400, 'Yes sir'], [2400, 2500, 'Yes'], [2900, 3000, 'Yes sir'], [3000, 3100, 'Yes'], [3100, 3600, 'No']]), ('partial repair probe: stored text form', [[[500, 600, 'Go\nnow'], [1000, 2000, 'Yes sir']], 100], [[500, 600, 'Go now'], [1000, 2000, 'Yes sir']]), ('partial repair variant: stored text form', [[[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes  sir'], [2082, 3082, 'Yes']], 40], [[0, 1000, 'Yes'], [1041, 1141, 'Yes sir'], [1541, 2041, 'Yes sir'], [2082, 3082, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [540, 900, 'Yes']], 40], [[0, 900, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('normal control', [[[0, 100, ''], [-200, 800, ''], [799, 1299, 'No'], [599, 1599, 'No'], [1600, 1700, '']], 0], [[0, 100, ''], [-200, 800, ''], [799, 1599, 'No'], [1600, 1700, '']]), ('normal control', [[[0, 100, 'No'], [199, 299, 'No']], 100], [[0, 299, 'No']]), ('normal control', [[[0, 100, 'Yes sir']], 100], [[0, 100, 'Yes sir']])], [('regression: stored text form', [[[500, 1000, ' Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']], 0], [[500, 1000, 'Yes'], [300, 400, ''], [400, 1400, 'Yes sir'], [1401, 1501, 'No'], [801, 1301, 'Yes sir']]), ('regression variant: stored text form', [[[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, '  '], [1899, 1999, '']], 100], [[500, 1000, 'No'], [1099, 1599, 'Go now'], [1700, 1800, ''], [1899, 1999, '']]), ('partial repair probe: stored text form', [[[0, 500, 'Yes  sir'], [-200, -100, '  '], [1, 101, 'Go\nnow'], [501, 601, 'Yes'], [700, 1700, 'Go now']], 100], [[0, 500, 'Yes sir'], [-200, -100, ''], [1, 101, 'Go now'], [501, 601, 'Yes'], [700, 1700, 'Go now']]), ('partial repair variant: stored text form', [[[500, 1500, 'Go now'], [1900, 2400, 'Yes '], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes  sir'], [5501, 5601, ' Yes']], 0], [[500, 1500, 'Go now'], [1900, 2400, 'Yes'], [2800, 3800, 'No'], [3800, 4800, 'Yes sir'], [4801, 5801, 'Yes sir'], [5501, 5601, 'Yes']]), ('boundary control', [[[0, 500, 'Yes'], [100, 300, 'Yes']], 0], [[0, 500, 'Yes']]), ('boundary control', [[[0, 100, 'A'], [150, 200, 'A']], 40], [[0, 100, 'A'], [150, 200, 'A']]), ('normal control', [[[0, 500, 'No']], 40], [[0, 500, 'No']]), ('normal control', [[[500, 600, 'Go now']], 0], [[500, 600, 'Go now']]), ('normal control', [[[0, 100, ''], [199, 299, 'Yes']], 100], [[0, 100, ''], [199, 299, 'Yes']])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression: stored text form[[0, 100, ''], [100, 200, '']][[0, 100, ''], [100, 200, '']]Passed
regression variant: stored text form[[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']][[0, 1000, 'Yes sir'], [1000, 1100, ''], [800, 900, 'Yes sir']]Failed
partial repair probe: stored text form[[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']][[0, 2400, 'Yes'], [2100, 2200, 'Yes sir']]Failed
partial repair variant: stored text form[[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go\nnow']][[500, 1500, 'Yes'], [1600, 2100, 'Yes sir'], [1400, 2400, 'Yes'], [2501, 3001, 'Go now']]Failed
boundary control[[0, 900, 'Yes']][[0, 900, 'Yes']]Passed
boundary control[[0, 500, 'Yes']][[0, 500, 'Yes']]Passed
normal control[[0, 100, 'A'], [150, 200, 'A']][[0, 100, 'A'], [150, 200, 'A']]Passed
normal control[[500, 1000, ''], [1000, 1100, 'Go now']][[500, 1000, ''], [1000, 1100, 'Go now']]Passed
normal control[[500, 1500, ''], [1200, 1300, 'Yes']][[500, 1500, ''], [1200, 1300, 'Yes']]Passed

SHA-256 / bb99557975e8085dbcbe18627cf84c0135c52c05e1f6258773fede54158881a8

HELD IN THE MEMBER ARCHIVE

The verified repair and its recorded checks are member-only.

This mechanism has 9 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.

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Verification & scope

A deterministic bounded teaching model with a stipulated toy contract; it does not claim conformance to any subtitle standard. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:49:32.055267+00:00.

Case digest / ba7b37eef923be39da8099b9b2ed645ad0f82a1c9d8d0d43fc32bf4d8b71eaa1